BCM4321 on Latitude D430

At kernel 3

find wireless hardware

lspci | grep -i wireless

 check using current kernel module with PCI bus address

lspci -vv -s 0c:00.0

If currently not using wl, add to blacklist all.

vim /etc/modprobe.d/b4321-blacklist.conf 

 

blacklist ssb

blacklist b43

blacklist bcma

Install wl,

apt install broadcom-sta-dkms